Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing organic forward osmosis membrane

A forward osmosis membrane, organic technology, applied in the field of membrane separation, can solve the problems of low retention rate, low membrane strength, low permeation flux, etc., to reduce internal concentration polarization, improve permeation flux, and increase antibacterial properties. Effect

Active Publication Date: 2016-06-15
薛立新
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The organic forward osmosis membrane produced by the existing method has poor hydrophilicity, large internal concentration polarization, small permeation flux, low rejection rate and poor antibacterial property, low membrane strength, and poor practical performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Using triacetate cellulose as a polymer, 13.1% (V%) triacetate cellulose and 0.9% (V%) chitin nanocrystals were added to 57.8% (V%) 1,4-dioxane , 19.6% (V%) of acetone and 8.6% (V%) of methanol in a mixed solvent, stirred at a temperature of 60°C for 9 hours to dissolve and form chitin nanocrystals with a content of 0.9% (V%) Casting solution; let it stand for more than 24 hours to completely defoam; stir the casting solution evenly and apply it on the substrate after standing for degassing, and use a scraper to scrape evenly on the substrate to form a bottom film layer, and apply the substrate The bottom mold layer on the material is left to stand in the air for 30 seconds, and then the bottom film layer is put into a gel bath (the composition of the gel bath is deionized water) to form a film with a dense skin layer through phase inversion gel, and The membrane was heat-treated in a water bath at 50° C. for 5 minutes, and after cleaning, it was stored in 1% sodium bis...

Embodiment 2

[0021] Using cellulose diacetate as the polymer, 12.2% (V%) cellulose diacetate and 0.8% (V%) 1-pyrenebutyric acid nanoparticles were added to 55.1% (V%) 1,4-bis Oxycycline, 20.6% (V%) of acetone, 7.2% (V%) of methanol and 4.2% (V%) of lactic acid mixed into the mixed solvent, stirred at a temperature of 70 ° C for 24 hours and dissolved to form 0.9 % (V%) of the casting solution of chitin nanocrystals; let stand for more than 24h to make it completely defoamed; ultrasonically disperse for 30min; The scraper scrapes the substrate evenly to form a bottom film layer, and the bottom film layer on the substrate is left to stand in the air for 15 seconds, and then the bottom film layer is put into a gel bath to undergo phase inversion and gel into a dense skin layer. Membrane, wash the prepared membrane with deionized water, remove the residual organic solvent, and prepare an organic forward osmosis membrane, and heat-treat the membrane in a water bath at 60°C for 10min, after full...

Embodiment 3

[0025] Weigh 20g of polysulfone polymer, dissolve it in 80g of mixed solvent composed of N,N-dimethylacetamide and polyethylene glycol 400 (the ratio of the two is 72:8), and make the polymer concentration 20% Add 1g of organic carbon nanotubes to the prepared polysulfone solution, disperse in ultrasonic for 30 minutes to prepare a casting solution containing 1wt% organic carbon nanotubes, stir the casting solution evenly, and statically After defoaming, it is coated on the substrate, and scraped evenly on the substrate with a scraper to form a bottom film layer, and the bottom mold layer is put into a gel bath to form a gel film. The acid chloride was subjected to interfacial polymerization reaction on the formed membrane, and reacted at 110° C. for 3 minutes; after the interfacial polymerization reaction, the prepared membrane was washed with deionized water to remove residual organic solvent, thereby preparing an organic forward osmosis membrane.

[0026] The water flux of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing an organic forward osmosis membrane. According to the preparation method, nanometer particles are added, and the preparation method comprises the specific steps of matching, stirring, standing still, coating and the like. The prepared organic forward osmosis membrane remarkably improves hydrophilia of the membrane, reduces internal concentration difference polarization, improves permeation flux, reserves a high retention rate, remarkably improves antimicrobial property, enhances strength of the membrane due to the nanometer particle size and is more practical.

Description

technical field [0001] The invention relates to a method for preparing a permeable membrane, in particular to a method for preparing an organic forward osmosis membrane, and belongs to the technical field of membrane separation. Background technique [0002] FO (Forward Osmosis) technology is an osmosis-driven membrane process with low energy consumption, low pollution, and high recovery. It has realistic or potential application prospects in seawater desalination, wastewater treatment, energy generation, food processing, and drug concentration. However, the lack of efficient FO membrane materials greatly restricts the development of FO technology. The membrane materials currently used in the FO process all have an asymmetric structure, consisting of a thin selective separation layer and a porous support layer. In the FO process, there are both external concentration polarization and internal concentration polarization, especially the internal concentration polarization. As...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D71/16B01D71/68B01D69/12B01D67/00
CPCB01D67/0013B01D69/12B01D71/16B01D71/68B01D2323/02B01D2325/36B01D2325/48
Inventor 薛立新张安将赵秀兰刘义平潘惠凯盛建芳
Owner 薛立新
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com